WILEY-VCH Verlag GmbH & Co. The Journal's web site is located at http://www.wiley-vch.de/home/an

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Astronomische Nachrichten

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This is the accepted version of the following article: Astronomische Nachrichten, 2014, v. 335 n. 3, p. 291-295, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/asna.201312034/abstract

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.